CN1639171A - Process for production of heteroaryl-type boron compounds with iridium catalyst - Google Patents

Process for production of heteroaryl-type boron compounds with iridium catalyst Download PDF

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CN1639171A
CN1639171A CN03805187.7A CN03805187A CN1639171A CN 1639171 A CN1639171 A CN 1639171A CN 03805187 A CN03805187 A CN 03805187A CN 1639171 A CN1639171 A CN 1639171A
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CN1318431C (en
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宫浦宪夫
石山龙生
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Mitsubishi Rayon Co Ltd
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    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F5/00Compounds containing elements of Groups 3 or 13 of the Periodic Table
    • C07F5/02Boron compounds
    • C07F5/025Boronic and borinic acid compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/18Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms
    • B01J31/1805Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms the ligands containing nitrogen
    • B01J31/181Cyclic ligands, including e.g. non-condensed polycyclic ligands, comprising at least one complexing nitrogen atom as ring member, e.g. pyridine
    • B01J31/1815Cyclic ligands, including e.g. non-condensed polycyclic ligands, comprising at least one complexing nitrogen atom as ring member, e.g. pyridine with more than one complexing nitrogen atom, e.g. bipyridyl, 2-aminopyridine
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/16Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
    • B01J31/22Organic complexes
    • B01J31/2282Unsaturated compounds used as ligands
    • B01J31/2295Cyclic compounds, e.g. cyclopentadienyls
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    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2231/00Catalytic reactions performed with catalysts classified in B01J31/00
    • B01J2231/40Substitution reactions at carbon centres, e.g. C-C or C-X, i.e. carbon-hetero atom, cross-coupling, C-H activation or ring-opening reactions
    • B01J2231/46C-H or C-C activation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B01J23/46Ruthenium, rhodium, osmium or iridium
    • B01J23/468Iridium
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    • B01J2531/00Additional information regarding catalytic systems classified in B01J31/00
    • B01J2531/80Complexes comprising metals of Group VIII as the central metal
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    • B01J2531/827Iridium

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Abstract

The invention provides an economical, simple, and industrially advantageous process for the production of heteroaryl-type boron compounds by reacting an heteroaromatic compound with a boron compound in one step under mild conditions, which permits selective production of an aromatic heterocycle -monoboron compound and an aromatic heterocycle-diboron compound in high yield and which makes it possible to give both products at a desired ratio only by changing the charge ratio between the raw materials. Specifically, a process for production of heteroaryl-type mono- or di-boron compounds, characterized by reacting a heteroaromatic compound with bis(pinacolato)diboron or pinacolatodiborane in the presence of an iridium catalyst and a ligand such as bipyridyl.

Description

Use iridium catalyst to prepare the method for aromatic heterocycle type boron compound
Technical field
The present invention relates to a kind of use and contain the method that iridium catalyst prepares the aromatic heterocycle boron compound.Aromatic heterocycle boron compound according to the present invention's preparation can be used as the substrate for preparing diaryl and polyaryl derivative, and this analog derivative can be used as pharmacy, agrochemistry intermediate and functional organic material and uses.
Background technology
Technology had in the past proposed the boronation method of various aromatic hydrocarbon.For example: known method has trifluoride (trifurate) lithiumation (lithionation), halogenation or the boronation method afterwards that is converted into phenyl ring, its example comprises: (1) uses method (the P.Rocca et al. of aryl halide or aryl trifluoride (trifurate) and tetramethyl ethylene ketone two boron compounds, J.Org.Chem., 58,7832,1993) (2) relate to after the aromatic ring lithiumation method (3) with the reaction of boron ester and relate to the method (A.R.Martin that reacts with the boron ester behind aryl halide and the reactive magnesium, Y.Yang, Acta..Chem.Scand., 47,221,1993).
In addition, the direct boronation example of known benzene also comprises: (4) use the halid method of boron (T.R.Kelly et al., Tetrahedron Lett., 35,7621 (1994); P.D.Hobb.et al.J.Chem.Sco.Chem.Commun., 923 (1996); T.R Hoye, M.Chen, J.Org.Chem.,, 61,7940 (1996)), (5) use method (Iverson, C.N., Smith, the M.R. that contains iridium catalyst, III.J.Am.Chem.Soc., 121,7696 (1999)), (6) use the method (Chen.H of rhenium-containing catalysts, Hartwig, J.F., Agnew.Chem.Int.Ed., 38,3391 (1999)), (7) use method (Chen, H., the Hartwig of rhodium-containing catalyst, J.F., Science, 287,1995 (2000); Cho, J.Y, Iverson, C.N., Smith, M.R., III.J.Am.Chem.Soc., 122,12868 (2000); Tse, M.K., Cho, J.Y, Smith, M.R., III.Org.Lett., 3,2831 (2001); Shimada, S., Batsanov, A.S., Howard, J.A.K, Marder, T.B., Angew.Chem.Int.Ed., 40,2168 (2001)), (8) use method (Cho, J.Y, Tse, M.K., Holmes, Science, 295,305 (2002) that contain iridium catalyst; Ishiyama, T., Takagi, J., Ishida, K., Miyaura, N., Anastasi, N.R., Hartwig, J.F., J.Am.Chem.Soc., 124,390 (2002)).
Yet the example of the boronation reaction of relevant heteroaromatic compounds does not almost have, and only known example is reacted with borine after to be that (9) are a kind of make Silver monoacetate act on indoles, the method of hydrolysis (K.Kamiyama, T.Watanabe, M.Uemura more subsequently, J.Org.Chem., 61,1375 (1996)).
Although (1) method to (9) is the example of known aforesaid aromatic nucleus boronation, there is following shortcoming in these examples in the past: lithiumation, halogenation and three that method (1) to (3) is carried out phenyl ring are fluoridized and are related to a large amount of steps, therefore produce industrial problem.And method (1) has only been utilized in employed two boron one in two boron atoms, thereby uneconomical, and method (2) and (3) have been owing to experienced the intermediate product of hyperergy, therefore to sizable restriction that causes of the functional group of employed substrate.The shortcoming of method (4) is a severe reaction conditions, and productive rate lowly reaches and form isomer when substrate contains functional group.In method (5) in the method for (7), the problem that also has catalyzer to be difficult to obtain when having the problem of requirement severe reaction conditions.In method (8), although have certain methods the boronation of phenyl ring is taken place with high yield with one step, there is not the known fragrant heterocyclic example that is applied to.In relating to the boronation method (9) that is applied to heterocycle (complex ring), has after making deleterious Silver monoacetate act on indoles the shortcoming of having to make borine to react with toxicity, explosion hazard.Consider these situations, be necessary to develop the boronation reaction of a kind of new fragrant heterocycle that can address the above problem (aromatic complex ring).
Summary of the invention
The result of the broad research of carrying out for addressing the above problem is, thereby the present inventor has studied the method that the new boronation method of heteroaromatic compounds has been established the very useful fragrant heterocycle boron compound of a kind of preparation, this method use the iridium catalyst of preparation easily and as the dipyridyl derivatives of part, this is reflected under the mild conditions effectively carry out, generate hardly by product and can make heteroaromatic compounds list boron or two boronations, the present invention is accomplished with one step.
That is, first purpose of the present invention relates to a kind of with the logical formula V or (VI) preparation method of the heteroaryl boron compound of expression,
Figure A0380518700071
Figure A0380518700081
(wherein, X, Y, Z, R 1And R 2With identical) to give a definition
It comprises: in the presence of catalyzer that contains iridium and part, make with the heteroaromatic compound of following general formula (I) expression with following general formula (III) or (IV) the boron compound reaction of expression.
(wherein, X represents that Sauerstoffatom, sulphur atom maybe can have substituent imino-, Y and Z can be identical also can be different, separately expression-CH=or-N=, R 1And R 2Can be identical also can be different, represent hydrogen atom, straight or branched C separately 1-8Alkyl, straight or branched C 1-8Alkoxyl group, nitro, cyano group, halo C 1-8Alkyl, halogen atom, formamyl, C 1-8Acyl group, C 1-8Alkoxy carbonyl, can have substituent amino or following general formula (II), wherein R 1And R 2Adjacent formation ring:
Figure A0380518700083
(R 3Expression hydrogen atom, straight or branched C 1-8Alkyl, straight or branched C 1-8Alkoxyl group, nitro, cyano group, halo C 1-8Alkyl, halogen atom, formamyl, C 1-8Acyl group, C 1-8Alkoxy carbonyl maybe can have substituent amino))
Second purpose of the present invention relates to the general formula (VIII) or (IX) preparation method of heteroaryl boron compound of expression,
Figure A0380518700092
(wherein, U, V, W, R 4And R 5With identical) to give a definition
It comprises: in the presence of catalyzer that contains iridium and part, make with the heteroaromatic compound of following general formula (VII) expression with following general formula (III) or (IV) the boron compound reaction of expression.
Figure A0380518700093
(wherein, U, V and W can be identical also can be different, separately expression-CH=or-N=, R 4And R 5Can be identical also can be different, represent hydrogen atom, straight or branched C separately 1-8Alkyl, straight or branched C 1-8Alkoxyl group, nitro, cyano group, halo C 1-8Alkyl, halogen atom, formamyl, C 1-8Acyl group, C 1-8Alkoxy carbonyl, can have substituent amino, or following general formula (II), wherein R 4And R 5Adjacent formation ring:
(wherein, R 3Expression hydrogen atom, straight or branched C 1-8Alkyl, straight or branched C 1-8Alkoxyl group, nitro, cyano group, halo C 1-8Alkyl, halogen atom, formamyl, C 1-8Acyl group, C 1-8Alkoxy carbonyl maybe can have substituent amino))
Figure A0380518700102
Preferred forms of the present invention
To explain the present invention in detail below.Any heteroaromatic compound can be used for the present invention's raw material heteroaromatic compound, as long as it contains a fragrant sp at least 2C h bond gets final product.
Although being used for the iridium catalyst that contains of the present invention can be catalyzer arbitrarily, as long as it is the compound that contains iridium (Ir), this contain iridium catalyst preferably below the catalyzer represented of general formula (X):
IrABn (X)
The alkene that anionicsite that the cationic moiety that it is represented by Ir, A are represented and B represent is partly formed.More preferably, the anionicsite that A represents is the chlorine atom, alkoxyl group, and hydroxyl or have or do not have substituent phenoxy group, B is compound such as the COD (1, the 5-cyclooctadiene) that contains alkene, COE (1-cyclooctene) or indenes and n are 1 or 2.Concrete example comprises IrCl (COD), IrCl (COE) 2, Ir (OMe) (COD), Ir (OH) (COD) and Ir (OPh) (COD).With respect to two (tetramethyl ethylene ketone base) two boron or tetramethyl ethylene ketone borine, its consumption is 1/100000 to 1 mole, is preferably 1/10000 to 1/10 mole.
Although the part among the present invention is not had special restriction, as long as it is and to contain iridium catalyst coordinate Lewis base, but it is preferably the bidentate Lewis base, more preferably with the compound of following general formula (XI) expression, it has the part-structure that contains or do not contain substituent dipyridyl
Figure A0380518700171
(wherein, R 6And R 7Can be identical also can be different, represent hydrogen atom separately, straight or branched C 1-8Alkyl, straight or branched C 1-8Alkoxyl group, nitro, cyano group, halo C 1-8Alkyl, halogen atom, formamyl, C 1-8Acyl group, C 1-8Alkoxy carbonyl or contain or do not contain substituent amino, or be following general formula (II), wherein R 6And R 76 and 6 ' locates to replace in the position:
Figure A0380518700172
(wherein, R 3The expression hydrogen atom, straight or branched C 1-8Alkyl, straight or branched C 1-8Alkoxyl group, nitro, cyano group, halo C 1-8Alkyl, halogen atom, formamyl, C 1-8Acyl group, C 1-8Alkoxy carbonyl, or contain or do not contain substituent amino), the object lesson of part comprises: trialkyl phosphuret-(t)ed hydrogen, as: triphenyl phosphatization hydrogen and tributyl phosphuret-(t)ed hydrogen; Quadrol, as: Tetramethyl Ethylene Diamine and quadrol; Dipyridyl, as: 4,4 '-the di-t-butyl dipyridyl, 2,2 '-dipyridyl, 4,4 '-two-methoxyl group dipyridyl, 4,4 '-two (dimethylamino) dipyridyl, 4,4 '-dichloro dipyridyl and 4,4 '-di nitryl pyridine and 1, the 10-phenanthroline.Preferred object lesson comprises: dipyridyl, as: 4,4 '-the di-t-butyl dipyridyl, 2,2 '-dipyridyl, 4,4 '-two-methoxyl group dipyridyl, 4,4 '-two (dimethylamino) dipyridyl, 4,4 '-dichloro dipyridyl and 4,4 '-di nitryl pyridine.With respect to two (tetramethyl ethylene ketone base) diboranes or tetramethyl ethylene ketone borine, the consumption of part is 1/100000 to 1 mole, preferred 1/10000 to 1/10 mole.
Although reaction of the present invention can be carried out under solvent-free, it also is suitable being to use solvent.Do not have special restriction to being used for solvent of the present invention, as long as it does not exert an influence to reaction, the example of such solvent comprises: hydrocarbon, as: octane, pentane, heptane and hexane; Acid amides, as: dimethyl formamide and N,N-DIMETHYLACETAMIDE; Pyrrolidone, as: the N-N-methyl-2-2-pyrrolidone N-; Ketone and sulfoxide, as: acetone, ethyl methyl ketone, dimethyl sulfoxide (DMSO); Aromatic hydrocarbon, as: benzene,toluene,xylene, 1; Nitrile, as: acetonitrile; Ether, as: Di Iso Propyl Ether, tetrahydrofuran (THF) , diox, 1,2-glycol dimethyl ether and methyl-phenoxide; Alcohol, as: methyl alcohol, ethanol, propyl alcohol, ethylene glycol and propylene glycol; Hydrocarbon as octane, pentane, heptane and hexane is preferred.Be reflected in 0 ℃~180 ℃ scopes and carry out, preferably in 10 ℃~150 ℃ scopes, carry out.
By the aforesaid aromatic heterocyclic compounds of suitable selection (I) or (VII) and aforesaid, single boronation and two boronations can be adjusted to the incidence of expectation by (III) or (IV) ratio of boron compound of expression.The incidence of single boronation and two boronations because of aromatic heterocyclic compounds (I) or (VII) and boron compound (III) or ratio (IV) change, aromatic heterocyclic compounds (I) or consumption (VI) are excessive big more, the single boronation of preferential more generation.Usually, when being purpose, with respect to boron compound (III) or (IV), use 2~100 times of moles, preferably use the aromatic heterocyclic compounds (I) of 2~50 times of moles or (VII) with single boronation.In addition, when being purpose, with respect to boron compound (III) or (IV), use 1/100 times~2 times moles, preferably use the aromatic heterocyclic compounds (I) of 1/10~1.5 times of mole or (VII) with two boronations.
Although the reaction times, temperature of reaction etc. changed to some extent because of catalytic amount,, be generally 0.2~120 hour, be preferably 2~24 hours.In addition, for preventing to cause catalyst deactivation by oxygen, reaction is preferably carried out under atmosphere of inert gases.The example of rare gas element comprises nitrogen and argon gas.In addition, although reaction pressure is not had special restriction, reaction is generally under atmospheric pressure carried out.
Although target product of the present invention can obtain by this method with the aromatic heterocycle boron compound that leads to formula V, (VI), (VIII) and (IX) represent, but, can carry out conventional purification process to improve purity, its example comprises: with the saturated brine washing, concentrate, precipitation, crystallization and distillation.In addition, the target product that obtains can be used processing such as silica gel, aluminum oxide.
Embodiment
Although hereinafter given more detailed explanation by embodiment to the present invention, the present invention only is confined to this.
Embodiment 1
Synthesizing of 2-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) thiophene:
Two (tetramethyl ethylene ketone base) two boron (1mmol), heteroaromatic compound thiophene (10mmol), catalyst I rCl (COD) (0.03mmol) after part dipyridyl (dtbpy) (0.03mmol) and octane (6ml) mixes, stirs at 80 ℃ on one side and heated 16 hours.Behind the cool to room temperature, mixture with dilution with toluene, is washed with saturated brine then.After organic layer under reduced pressure concentrated, residue was removed in distillation, obtains 2-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) thiophene, and productive rate is 75%.
1H-NMR (400MHz, CDCl 3, TMS): δ 1.35 (s, 12H), 7.20 (dd, 1H, J=3.7 and 4.6Hz), 7.64 (d, 1H, J=4.6Hz), 7.66 (d, 1H, J=3.4Hz)
13C-NMR(100MHz,CDCl 3,TMS):δ24.75,84.07,128.21,132.35,137.14
MS?m/e:43(33),110(50),111(100),124(82),195(72),210(M +,96)
The C that calculates 10H 15BO 2The accurate molecular weight of S is: 210.0886, and actual molecular weight (found) is: 210.0881
Embodiment 2
Synthesizing of 2-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) thiophene:
Figure A0380518700192
Except using pyridine (bpy) to replace dipyridyl (dtbpy), repeat the step identical with embodiment 1 as the part.Productive rate is 60%.
Embodiment 3
Synthesizing of 2-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) thiophene:
Figure A0380518700201
Except using Ir (OMe) (COD) to replace IrCl (COD) to do the catalyzer, repeat the step identical with embodiment 1, descend to react 4 hours at 25 ℃.Productive rate is 88%.
Embodiment 4
Synthesizing of 2-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) thiophene:
Figure A0380518700202
Except using Ir (OH) (COD) to replace IrCl (COD) to do the catalyzer, repeat the step identical with embodiment 1, descend to react 4 hours at 25 ℃.Productive rate is 86%.
Embodiment 5
Synthesizing of 2-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) thiophene:
Figure A0380518700203
Except using Ir (OPh) (COD) to replace IrCl (COD) to do the catalyzer, repeat the step identical with embodiment 1, descend to react 4 hours at 25 ℃.Productive rate is 82%.
Embodiment 6
Synthesizing of 2-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) thiophene:
Except using 1.0mmol tetramethyl ethylene ketone borine to replace two (tetramethyl ethylene ketone base) two boron, repeat the step identical with embodiment 1.Productive rate is 75%.
Embodiment 7
Synthesizing of 2-methyl-5-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) thiophene:
Figure A0380518700211
Except using the 2-thiotolene to replace thiophene, repeat the step identical with embodiment 1 as the heteroaromatic compound.Productive rate is 85%.
1H-NMR(400MHz,CDCl 3,TMS):δ1.33(s,12H),2.53(s,3H),6.84(d,1H,J=3.4Hz),7.45(d,1H,J=3.4Hz)
13C-NMR(100MHz,CDCl 3,TMS):δ15.36,24.72,83.85,126.98,137.62,147.52
MS?m/e:123(31),124(76),138(85),209(49),224(M +,100)
The C that calculates 11H 17BO 2The accurate molecular weight of S is: 224.1042, and actual molecular weight is: 224.1044
Embodiment 8
Synthesizing of (4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) furans:
Figure A0380518700212
Except using furans to replace thiophene, repeat the step identical with embodiment 1 as the heteroaromatic compound.Productive rate is 80% (2-position boronation/3-position boronation=92/8).
1H-NMR (400MHz, CDCl 3, TMS): δ (2-isomer) 1.35 (s, 12H), 6.45 (dd, 1H, J=1.7 and 3.4Hz), 7.08 (d, 1H, J=3.4Hz), 7.66 (dd, 1H, J=1.4Hz); δ (3-isomer) 1.32 (s, 12H), 6.59 (dd, 1H, J=0.7 and 1.7Hz), 7.47 (t, 1H, J=1.5Hz), 7.78 (m, 1H)
13C-NMR (100MHz, CDCl 3, TMS): δ (2-isomer) 24.73,84.20,110.30,123.19,141.31; Do not observe the 3-isomer.
MS?m/e:43(33),95(28),109(31),151(100),179(29),194(M +,39)
C 10H 15BO 3Accurate molecular weight be: 194.1114, actual molecular weight is: 194.1122
Embodiment 9
2-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) pyrroles's is synthetic:
Except using the pyrroles to replace thiophene, repeat the step identical with embodiment 1 as the heteroaromatic compound.Productive rate is 60%.
1H-NMR (400MHz, CDCl 3, TMS): δ 1.32 (s, 12H), 6.30 (ddd, 1H, J=2.3,2.3 and 3.4Hz), 6.85 (ddd, 1H, J=1.2,2.2 and 3.4Hz), 7.00 (ddd, 1H, J=1.2,2.4 and 2.4Hz), 8.79 (br s, 1H)
13C-NMR(100MHz,CDCl 3,TMS):δ24.75,83.56,109.70,119.99,122.64
MS?m/e:107(49),178(41),193(M +,100)
Embodiment 10
Synthesizing of synthetic (4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) pyridine:
Figure A0380518700222
Except using the 2mmol pyridine to replace thiophene, repeat the step identical with embodiment 1 as the heteroaromatic compound.Productive rate is 60%.
1H-NMR (400MHz, CDCl 3, TMS): δ (4-isomer), (3-isomer);
13C-NMR (100MHz, CDCl 3, TMS): δ (4-isomer), (3-isomer);
MS?m/e:105(32),106(73),119(100),190(99),205(M +,90)
C 11H 16BNO 2Accurate molecular weight be: 205.1274, actual molecular weight is: 205.1265
Embodiment 11
Synthetic 2-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) benzo [b] thiophene:
Except using the 4mmol thionaphthene to replace thiophene, repeat the step identical with embodiment 1 as the heteroaromatic compound.Productive rate is 85%.
1H-NMR (400MHz, CDCl 3, TMS): δ 1.38 (s, 12H), 7.35 (ddd, 1H, J=1.7,7.3 and 8.8Hz), 7.37 (ddd, 1H, J=1.8,7.1 and 9.0Hz), 7.85 (dd, 1H, J=2.2 and 9.0Hz), 7.89 (s, 1H), 7.91 (dd, 1H, J=1.5 and 9.0Hz)
13C-NMR(100MHz,CDCl 3,TMS):δ24.80,84.43,122.51,124.08,124.36,125.29,134.48,140.43,143.71
MS?m/e:160(80),174(87),259(25),260(M +,100)
C 14H 17BO 2The accurate molecular weight of S is: 260.1042, and actual molecular weight is: 260.1038
Embodiment 12
Synthesizing of 2-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) benzo [b] furans:
Except using the 4mmol cumarone to replace thiophene, repeat the step identical with embodiment 1 as the heteroaromatic compound.Productive rate is 87% (2-position boronation/3-position boronation=93/7).
1H-NMR (400MHz, CDCl 3, TMS): δ (2-isomer) 1.39 (s, 12H), 7.23 (t, 1H, J=7.4Hz), 7.34 (dt, 1H, J=1.2 and 7.8Hz), 7.40 (s, 1H), 7.57 (d, 1H, J=8.5Hz), 7.63 (d, 1H, J=7.8Hz), and (3-isomer) 1.37 (s, 12H), 7.26 (ddd, 1H, J=1.8,7.3 and 9.3Hz), 7.29 (ddd, 1H, J=2.1,7.3 and 9.5Hz), 7.50 (dd, 1H, J=2.4 and 6.6Hz), 7.92 (dd, 1H, J=2.7 and 9.5Hz), 7.92 (dd, 1H, J=2.4 and 6.3Hz), 7.95 (s, 1H)
13C-NMR (100MHz, CDCl 3, TMS): δ (2-isomer) 24.77,84.68,111.97,119.53,121.88,122.71,125.93,127.48,157.51; Do not observe the 3-isomer
MS?m/e:144(38),158(25),201(100),244(M +,72)
C 14H 17BO 3Accurate molecular weight be 244.1271, actual molecular weight is: 244.1274.
Embodiment 13
Synthesizing of 2-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) indoles:
Except using the 4mm0l indoles to replace thiophene, repeat the step identical with embodiment 1 as the heteroaromatic compound.Productive rate is 89%.
1H-NMR(400MHz,CDCl 3,TMS):δ1.36(s,12H),7.09(t,1H,J=7.7Hz),7.11(s,1H),7.23(t,1H,J=8.3Hz),7.38(d,1H,J=8.3Hz),7.67(d,1H,J=7.8Hz),8.56(br?s,1H)
13C-NMR(100MHz,CDCl 3,TMS):δ24.81,84.13,111.24,113.84,119.77,121.58,123.61,128.27,138.20
MS?m/e:143(35),186(42),242(27),243(M +,100)
C 14H 18BNO 2Accurate molecular weight be 243.1431, actual molecular weight is: 243.1438
Embodiment 14
Synthesizing of 3-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl)-1-(triisopropyl silyl) indoles:
Figure A0380518700241
Except using 4mmol N-triisopropyl silyl indoles to replace thiophene, repeat the step identical with embodiment 1 as the heteroaromatic compound.Productive rate is 81%.
1H-NMR (400MHz, CDCl 3, TMS): δ 1.14 (d, 18H, J=7.6Hz), 1.37 (s, 12H), 1.74 (qq, 3H, J=7.6 and 7.6Hz), 7.13 (ddd, 1H, J=1.8,7.3 and 9.0Hz), 7.16 (ddd, 1H, J=1.5,7.1 and 8.5Hz), (7.50 dd, 1H, J=2.3 and 6.5Hz), 7.67 (s, 1H), 8.06 (dd, 1H, J=2.8 and 6.2Hz)
13C-NMR(100MHz,CDCl 3,TMS):δ12.73,18.13,24.96,82.69,113.71,120.41,121.48,122.36,135.13,141.19,141.84
MS?m/e:230(28),356(27),399(M +,100)
C 23H 38BNO 2The accurate molecular weight of Si is: 399.2764, and actual molecular weight is: 399.2766
Embodiment 15
Synthesizing of 1-methyl-3-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) indoles:
Except using 4mmol N-skatole to replace thiophene, repeat the step identical with embodiment 1 as the heteroaromatic compound.Productive rate is 64%.
Embodiment 16
Synthesizing of 3-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) quinoline:
Except using quinoline to replace thiophene as the heteroaromatic compound, repeat the step identical with embodiment 1, react down at 100 ℃.Productive rate is 81%.
1H-NMR(400MHz,CDCl 3,TMS):δ1.40(s,12H),7.57(t,1H,J=7.4Hz),7.77(t,1H,J=7.7Hz),7.86(d,1H,J=8.1Hz),8.16(d,1H,J=8.1Hz),8.66(s,1H),9.21(s,1H)
13C-NMR(100MHz,CDCl 3,TMS):δ24.93,84.35,126.48,127.58,128.42,129.37,130.54,144.28,149.45,154.81
MS?m/e:155(89),169(54),198(37),240(83),255(M +,100)
C 15H 18BNO 2Accurate molecular weight be: 255.1430, actual molecular weight is: 255.1427.
Embodiment 17
2, the synthesizing of two (4,4,5,5-tetramethyl--1,3, the 2-dioxy boron penta ring-2-yl) thiophene of 5-:
Two (tetramethyl ethylene ketone base) two boron (1.1mmol), thiophene (1.0mmol), IrCl (COD) (0.03mmol) after dipyridyl (dtbpy) (0.03mmol) and octane (6ml) mixes, stir at 80 ℃ times on one side and heated 16 hours.Be cooled to room temperature, then with this mixture with dilution with toluene, wash with saturated brine.Organic layer under reduced pressure concentrates, and residue is removed in distillation then, obtains 0.8mmol 2, two (4,4,5,5-tetramethyl--1,3, the 2-dioxy boron penta ring-2-yl) thiophene of 5-.
1H-NMR(400MHz,CDCl 3,TMS):δ1.34(s,24H),7.67(s,2H)
13C-NMR(100MHz,CDCl 3,TMS):δ24.74,84.11,137.66
MS?m/e:43(50),59(27),237(43),250(100),321(32),336(M +,55)
C 16H 26B 2O 4The accurate molecular weight of S is: 336.1738, and actual molecular weight is: 336.1750
Embodiment 18
Synthesizing of two (4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) furans:
Figure A0380518700261
Except using furans to replace thiophene, repeat the step identical with embodiment 15 as the heteroaromatic compound.Productive rate is 70% (2,5-position two boronations/2,4-position two boronations=88/12).
1H-NMR (400MHz, CDCl 3, TMS): δ (2, the 5-isomer) 1.33 (s, 24H), 7.06 (s, 2H), (2.4-isomer) δ 1.30 (s, 24H), 7.28 (s, 1H), 7.96 (s, 1H)
13C-NMR (100MHz, CDCl 3, TMS): δ (2, the 5-isomer) 24.74,84.23,123.30, do not observe 2, the 4-isomer
MS?m/e:83(27),235(29),276(47),277(100),305(30),320(M +,63)
C 16H 26B 2O 5Accurate molecular weight be: 320.1966, actual molecular weight is: 320.1962
Embodiment 19
2, two (4,4,5,5-tetramethyl--1,3, the 2-dioxy boron penta ring-2-yl) pyrroles' of 5-is synthetic:
Figure A0380518700262
Except using the pyrroles to replace thiophene, repeat the step identical with embodiment 15 as the heteroaromatic compound.Productive rate is 79%.
1H-NMR(400MHz,CDCl 3,TMS):δ1.31(s,24H),6.83(d,2H,J=2.0Hz),9.28(br?s,1H)
13C-NMR(100MHz,CDCl 3,TMS):δ24.73,83.71,120.35
MS?m/e:234(29),319(M +,100)
C 16H 27B 2NO 4Accurate molecular weight be: 319.2126, actual molecular weight is: 319.2123
Embodiment 20
Synthesizing of 2-methoxyl group-5-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) thiophene:
Figure A0380518700271
Except using the 2-methoxythiophene to replace thiophene, repeat the step identical with embodiment 1 as the heteroaromatic compound.Productive rate is 82%.
Embodiment 21
Synthesizing of 2-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl)-5-(trifluoromethyl) thiophene:
Figure A0380518700272
Except using the 2-trifluoromethyl thiophene to replace thiophene, repeat the step identical with embodiment 1 as the heteroaromatic compound.Productive rate is 82%.
Embodiment 22
Synthesizing of 3-chloro-2-methyl-5-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl) thiophene:
Figure A0380518700273
Except using 3-chloro-2-thiotolene to replace thiophene, repeat the step identical with embodiment 1 as the heteroaromatic compound.Productive rate is 79%.
Embodiment 23
3-(4,4,5,5-tetramethyl--1,3,2-dioxy boron penta ring-2-yl)-1-(triisopropyl silyl) pyrroles's is synthetic:
Except using N-triisopropyl silyl pyrroles to replace thiophene, repeat the step identical with embodiment 1 as the heteroaromatic compound.Productive rate is 77%.
1H-NMR (400MHz, CDCl 3, TMS): δ 1.09 (d, 18H, J=7.6Hz), 1.32 (s, 12H), 1.46 (qq, 3H, J=7.6Hz and 7.6Hz), 6.62 (dd, 1H, J=1.2 and 2.4Hz), 6.81 (br t, 1H, J=2.8Hz), 7.23 (br d, 1H, J=1.2Hz)
13C-NMR(100MHz,CDCl 3,TMS):δ11.67,17.81,24.87,82.71,115.61,124.96,133.67
MS?m/e:83(35),223(51),224(70),348(30),349(M +,100)
C 19N 36BNO 2The accurate molecular weight of Si is: 349.2608, and actual molecular weight is: 349.2605
The commercial Application ability
Preparation in accordance with the present invention is by adjusting employed aforesaid heteroaromatic chemical combination Thing (I) or (VII) and aforementioned boron compound (III) or ratio (IV) can be regulated single boronation and two boronations To the expectation ratio. The present invention be a kind of economy, simple, industrialness is good, can be with high yield Rate, simple one-step method and under temperate condition, carry out the side of list or two boronation heteroaromatic compounds Method.

Claims (11)

1. one kind with the logical formula V or (VI) preparation method of the heteroaryl boron compound of expression,
Figure A038051870002C1
It is included under the existence of the catalyzer that contains iridium and part, make with the heteroaromatic compound of following general formula (I) expression with following general formula (III) or (IV) the boron compound reaction of expression, its formula of (V) and (VI) in X, Y, Z, R 1And R 2With identical to give a definition,
In general formula (I), X represents that Sauerstoffatom, sulphur atom maybe can have substituent imino-, Y and Z can be identical also can be different, separately expression-CH=or-N=, R 1And R 2Can be identical also can be different, represent hydrogen atom, straight or branched C separately 1-8Alkyl, straight or branched C 1-8Alkoxyl group, nitro, cyano group, halo C 1-8Alkyl, halogen atom, formamyl, C 1-8Acyl group, C 1-8Alkoxy carbonyl, can have substituent amino or following general formula (II), wherein R 1And R 2Adjacent formation ring:
In general formula (II), R 3Expression hydrogen atom, straight or branched C 1-8Alkyl, straight or branched C 1-8Alkoxyl group, nitro, cyano group, halo C 1-8Alkyl, halogen atom, formamyl, C 1-8Acyl group, C 1-8Alkoxy carbonyl maybe can have substituent amino.
Figure A038051870003C1
2. one kind with the general formula (VIII) or (IX) preparation method of heteroaryl boron compound of expression,
Figure A038051870003C2
It is included under the existence of the catalyzer that contains iridium and part, make with the heteroaromatic compound of following general formula (VII) expression with following general formula (III) or (IV) the boron compound reaction of expression, wherein, general formula (VIII) and (IX) in U, V, W, R 4And R 5With identical to give a definition,
In general formula (VII), U, V and W can be identical also can be different, separately expression-CH=or-N=, R 4And R 5Can be identical also can be different, represent hydrogen atom, straight or branched C separately 1-8Alkyl, straight or branched C 1-8Alkoxyl group, nitro, cyano group, halo C 1-8Alkyl, halogen atom, formamyl, C 1-8Acyl group, C 1-8Alkoxy carbonyl, can have substituent amino, or following general formula (II), wherein R 4And R 5Adjacent formation ring:
In general formula (II), R 3Expression hydrogen atom, straight or branched C 1-8Alkyl, straight or branched C 1-8Alkoxyl group, nitro, cyano group, halo C 1-8Alkyl, halogen atom, formamyl, C 1-8Acyl group, C 1-8Alkoxy carbonyl maybe can have substituent amino.
Figure A038051870004C3
3. preparation method according to claim 1 and 2, wherein, containing iridium catalyst is the catalyzer that following general formula (X) is represented:
IrABn (X)
Wherein, A represents the chlorine atom, straight or branched C 1-8Alkoxyl group, hydroxyl or have or do not have substituent phenoxy group, B represents 1,5-cyclooctadiene or 1-cyclooctene, n represents 1 or 2.
4. preparation method according to claim 3, wherein, the A that contains in the iridium catalyst is a methoxyl group, and B is 1, and 5-cyclooctadiene, n are 1.
5. preparation method according to claim 3, wherein, the A that contains in the iridium catalyst is the chlorine atom, and B is 1, and 5-cyclooctadiene, n are 1.
6. preparation method according to claim 3, wherein, the A that contains in the iridium catalyst is the chlorine atom, and B is the 1-cyclooctene, and n is 2.
7. according to each described preparation method in the claim 1 to 6, wherein, part is the part that following general formula (XI) is represented:
Figure A038051870005C1
Wherein, R 6And R 7Can be the same or different, represent hydrogen atom, straight or branched C separately 1-8Alkyl, straight or branched C 1-8Alkoxyl group, nitro, cyano group, halo C 1-8Alkyl, halogen atom, formamyl, C 1-8Acyl group, C 1-8Alkoxy carbonyl or have or do not have substituent amino, or following general formula (II), wherein R 6And R 7In the position 6 and 6 ' replace,
Wherein, R 3The expression hydrogen atom, straight or branched C 1-8Alkyl, straight or branched C 1-8Alkoxyl group, nitro, cyano group, halo C 1-8Alkyl, halogen atom, formamyl, C 1-8Acyl group, C 1-8Alkoxy carbonyl or have or do not have substituent amino.
8. preparation method according to claim 7, wherein, part is 2,2 '-dipyridyl.
9. preparation method according to claim 7, wherein, part is 4,4 '-di-t-butyl-2,2 '-dipyridyl.
10. according to each described preparation method in the claim 1 to 9, wherein, reaction is carried out in the presence of solvent.
11. preparation method according to claim 10, wherein, solvent is a hydrocarbon.
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US7709654B2 (en) * 2006-09-11 2010-05-04 Board Of Trustees Of Michigan State University Process for producing oxazole, imidazole, pyrrazole boryl compounds
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